make[6]: *** [mdct.lo] Error 1
make[6]: Leaving directory `/usr/src/tvheadend/libav_static/libvorbis-1.3.4/lib'
make[5]: *** [install-recursive] Error 1
make[5]: Leaving directory `/usr/src/tvheadend/libav_static/libvorbis-1.3.4/lib'
make[4]: *** [install-recursive] Error 1
make[4]: Leaving directory `/usr/src/tvheadend/libav_static/libvorbis-1.3.4'
make[3]: *** [/usr/src/tvheadend/libav_static/libvorbis-1.3.4/.tvh_build] Error 2
make[3]: Leaving directory `/usr/src/tvheadend'
Receiving data/dvb-scan/dvb-t from http://linuxtv.org/git/dtv-scan-tables.git
CC              src/version.o
CC              src/uuid.o
CC              src/main.o
In file included from src/main.c:69:0:
src/libav.h:23:34: fatal error: libavformat/avformat.h: No such file or directory
 #include <libavformat/avformat.h>
                                  ^
compilation terminated.
make[2]: *** [/usr/src/tvheadend/build.linux/src/main.o] Error 1
make[2]: Leaving directory `/usr/src/tvheadend'
make[1]: *** [override_dh_auto_build] Error 2
make[1]: Leaving directory `/usr/src/tvheadend'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2